Filter-unit forming machine



Dec. 31, 1940. G, A: ARNOLD FILTER-UNIT FORMING mcnnm Filed July 18,1959 2 Sheets-Sheet 1 INVENTOR 42, a, M

ATTORNEYS "Patented Dec. 31, 1940 PATENT OFFICE 2,226,961 FILTER-UNITFORMING MACHINE George A. Arnold, Chatham, N. I assignor to MotorImprovements, Inc., Newark, N. .L, a cor-' poration of DelawareApplication July 18, 1939. Serial No. 285,080

22 Claims. 242-1) This invention relates to filter-unit forming machinesand more especially to a machine for spirally winding metal ribbon intoa disk having filtering interstices provided by transverse ribs orspacers formed at regular intervals on one face of the ribbon. Theribbon is so narrow and thin as to be incapable of self-support and mustbe guided and supported during the opera- I ings, wherein:

Fig. 1 is a front elevation of a machine embodying the invention;

Fig. 2 is an end elevation partially broken away of such machine;

Fig. 3 is a section substantially on the line 3-3 of Fig. 1;

Fig. 4 is a side elevation partially broken away of a partially formedfilter produced by the machine;

. Fig. 5 is a section on the line 55 of Fig.4;

Fig. 6 is a side elevation similar to Fig. 4 of a complete filter, and

Fig. '7 is a section on the line 'I'I of Fig. 6.

Figs. 4 to 7 inclusive illustrate one embodiment of a filter equippedwith a pair of filtering disks each comprising a spirally wound ribbonhaving transverse ribs providing filtering interstices. In thisembodiment, a circular frame ID has a hub II and a rim l2 of equal widthwith spokes l3 of the same width as the hub and rim extendingtherebetween. 1

The hub is provided with peripheral apertures l4 between spokes I3 andbetween the hub and u the rim the spokes are connected by circular barsl5 of less width than the spokes. Also, additional bars I6 extendradially from the inner circular bar [5 to therim l2. A filtering diskl'l isarranged on each face of the frame In and 50 is suitably attachedthereto.v In Figs. 4 and 5, only one filtering disk II has beenassembled with the frame III while in Figs. 6 and 7, filtering disks l'lhave been assembled on both sides of the frame It. Rings iii are rivetedto opposite ends of the hub II and constitute shoulders supporting theinnermost turn of the spiral forming the disk ll. As shown in Figs. 4and 5, rods is fastened at opposite ends to the ring l8 and rim I2 bybolts 20 rest against the outer face of the disk II to maintain thelatter against 5 the ribs l3.- After filtering disks have been appliedto bothsides of the frame Ill, both disks are held in place by rods IS,the outer ends of which are attached to the rim I2 by bolts 2|! whilethe inner ends are held in place by bolts 10 2| fastened through collars22 and taking the place of the inner set of bolts shown in Fig. 5. Thecollars 22 provide means for mounting the frame on a pipe havingapertures communicat ing with the apertures l4 for the purpose of 15conducting away filtered liquid, the liquid to be filtered having beensupplied to the exterior surface of thedisks l9 and having passedthrough the interstices therein.

Referring now to Figs.1, 2 and 3, a frame 25 20 supports a rotatingshaft 26. On the shaft 26 is a pulley 21 rotatable with respect to theshaft 26 and having a clutch plate 28 in operative relation to a clutchplate 29 carried by the shaft 26. A spring 30 is arranged between thepulley 25 21 and a collar 3| supported at the end of a rod 32 extendingfrom the shaft 26. This arrangement constitutes a friction drive for theshaft 26, the pulley being provided with a belt 33 operated at aconstant speed by means not shown.

A plate or disk 34 is carried by the shaft 26 and is provided with a hub35 for receiving the hub ll of a frame ill, the frame being fastened tothe plate by means, not shown. An arm 36 35 is pivoted to the upper endof a post 31, the outer end of the arm 36 being arranged at right anglesto the major portion thereof. The arm 36 is provided with a head intowhich is threaded a bushing 36a and held in place by a lock nut 361). Arod 38 is slidably mounted in the bushing 36a and is provided at one endwith a nut and washer combination 39 and at the other end is providedwith an enlarged head 40 be tween which and the end of the bushing 36ais provided a coil spring 4|. A roller 42 is mounted on the head 40 bymeans of ball bearings 43. The axis of the roller 42 is parallel to theaxis of the shaft 26 and the spring 4| tends to project the rollertoward the disk 34. The'roller 42 is cut away to provide a cylindricalsurface 44 of slightly less width than the ribbon to be wound intospiral form, thus providing a shoulder 45 to engage the edge of saidribbon.

A carriage 45 is supported by a rod," slidable in the frame and coaxialwith the shaft 26. A guide rod 48 holds the carriage 48 againstrotation. A plurality of freely rotatable conical rollers are journalledon shafts supported at their inner ends by the carriage 46 with the axesof said rollers lying in the surface of a cone coaxial with said shaft26 and with each roller axis being coplanar with said shaft axis. Theeffective apex of each roller lies in the rotational axis of the plate34 and the angularity of each roller axis relative to the plate axis issuch that the spacing between the roller and plate is uniform throughoutthe entire length of the roller. The carriage 45 is movable toward andaway from the plate 34 and in the rod 41 are provided notches 50 and 5|into which'the screws 52 and 53 are adapted to be seated to fix thespacing of the rollers 49 with respect to the plate 34.

Feeding means 54 are provided for supplying ribbon R of the desired sizeand properly ribbed at a uniform rate of speed. Between the feedingmeans 54 and the plate 34 are provided suitable guiding means 55 andtensioning means 56.

In the operation of the machine above described, a frame I0 is arrangedon the plate 34 with one face in contact with said plate and with theframe hub I I surrounding the plate hub 35. The end of the ribbon Rsupplied from the feeding means 54 is attached to the outer surface ofthe exposed ring l8 after which the arm 36 and the rod 38 are adjustedto bring the surface 44 of the roller 42 into contact with the topsurface of the ribbon R and the shoulder 45 into engagement with theedge of such ribbon. A weight 51 on the arm 36 is so adjusted as tocause the roller 42 to exert proper pressure on the ribbon. While theribbon is being attached to the ring l8 and the roller 42 is beingpositioned, the rollers 49 are spaced away from the plate as far aspossible, but after the ribbon has been attached and the roller 42 hasbeen properly placed, the rollers 49 are moved toward the plate 34 tobring them into proper position to engage the edge of the ribbon R as itis wound up, the screw 52 being inserted into the notch to hold thecarriage in proper position. The feeding means 54 and the shaft 26 arenow set in rotation and the operation thereof is continued until theproper size disk of spirally wound ribbon has been formed on the face ofthe frame I0. Slippage of the clutch plates 28 and 129 permits variationin the rotational speed of the shaft 26 to maintain the peripheral speedof the disk at the same linear speed as the rate of feed of the ribbonby the feeding means 54.

The roller 42 presses the ribbon into contact with the frame In as theribbon is being wound up and insures even delivery of the ribbon to thespiral. Also, the roller 42 applies the proper pressure to insure tightwinding of the ribbon on the spiral. The shape, size and arrangement 5of the rollers 49 is such that there is only rolling contact betweenthem and the disk at all times, these rollers serving to hold the ribbonin place as the spiral builds up.

After a disk of proper size has been obtained,

7 operation of the apparatus is discontinued, the

ribbon R is severed and its end is soldered tq the frame 'or to the nextinner turn of the ribbon. A few rods i9 are then assembled with theframe and disk as shown in Fig. 4,, after 76 which the assembly isremoved from the plate and then remounted on the plate in reverseposition, the rods I! being received in grooves 58 provided in the faceof. the plate 34. Operation of the machine is then repeated for thepurpose of producing the second disk II, the operation being the sameexcept that the rollers 49 are spaced apart from the plate 34 anadditional distance equal to the width of the ribbon,

the screw 53 now being received in the notch 5|. After the completion ofthe second disk II, the end of the ribbon is fixed as previouslydescribed and rods l9 are arranged over the face of the second disk inthe same manner as before. The completed filter is now removed from themachine and the inner bolts 20 are removed from the rings it, afterwhich the hub members 22 are inserted in, place and attached by means ofthe bolts 2i. Also, a full set of rods I9 is assembled with the disks bymeans of the bolts 20 and 2|.

It is of course understood that various modifications may be made in thestructure above described, without in any way departing from the spiritof the invention defined in the apended claims.

I claim:

l. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, driving means therefor, abacking member rotatable with said hub, a roller between which and saidhub said ribbon is wound on to said hub, means supporting said rollerboth for movement toward and away from said hub and for movement towardand away from said backing member, said supporting means havingprovision for urging said roller toward said hub and said member, saidroller having a cylindrical portion of less width than said ribbonengaging one face thereof and an annular shoulder at the end of saidcylindrical portion engaging the edge of said ribbon, and conicalrollers having their axes lying in the surface of a cone coaxial withsaid hub and their surfaces in spaced relation to said backing memberfor engagement with the edge of ribbon wound on said hub.-

2. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit com,-

prising a winding hub, driving means therefor, 9. backing memberrotatable with said hub, a roller i between which and said hub saidribbon is wound one face thereof and an annular shoulder atthe end ofsaid cylindrical portion engaging the edge of said ribbon, conicalrollers having their axes lying in the surface of a cone coaxial withsaid hub and their surfaces in spaced relation to said backing memberfor engagement with the edge of ribbon wound on said hub, and a carrierfor said rollers movable axially of said hub.

3. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, driving means therefor,

a backing member rotatable with said hub, an arm pivotally supported onan axis parallel to said hub axis,. a roller supported by said arm formovement toward and away from said backing member and beinggravitationally urged tometal ribbon into'a disk form. filtering unitcomprising a winding hub, driving means therefor, a backing memberrotatable with said hub, an arm pivotally supported on an axis parallelto said hub axis, a roller supported by said arm for movement towardandaway from said backing member and being gravitationally urged towardsaid hub, resilient means urging said roller toward said backing member,said roller having a cylindrical portion of less width than the ribbonengaging one face thereof, an annular shoulder at the end of saidcylindrical portion engaging the edge of said ribbon and conical rollershaving their axes lying in the surface of a cone coaxial with said huband their surfaces in. spaced relation for engagement with the edge ofribbon wound on said hub.

5. A machine according to claim 4 characterized by a carrier for saidrollers movable axially of said hub.

6. A machine for winding transversely ribbed metal ribbon into a diskform flltering unit comprising a winding hub, a backing member rotatablewith said hub, a roller betweenwhich and said hub said ribbon is woundon to said hub, means supporting said roller both for movement towardand away from said hub and for movement toward and away from saidbacking member, said supporting means having provision for urging saidroller toward said hub and said member, said roller having a cylindricalportion of less width than said ribbon engaging one face thereof and anannular shoulder at the end of said cylindrical portion engaging theedge of said ribbon, means for supplying ribbon to said hub at constantspeed, and driving means for said hub.

'7. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, a backing member rotatablewith said hub, an arm pivotally supported on an axis parallel to the hubaxis, a roller supported by said arm for movement toward and away fromsaid backing member and being gravitationally urged toward said hub,said roller having a cylindrical portion of less width than said ribbonengaging one face thereof and a circumferential flange at one end ofsaid cylindrical portion for engagement with one edge of said ribbon,resilient means urging said roller toward said backing member, means forsupplying ribbon to said hub at constant speed, and driving means forsaid hub.

8. A machine according to claim '7 characterized by conical rollershaving their axes lying in the surface of a cone coaxial with the huband their surfaces in spaced relation to said backing member forengagement with the edge of ribbon wound on said hub.

9. A machine according to claim 7 characterized by conical rollershaving their axes lying in the surface of a cone coaxial with the huband their surfaces in spaced relation to said backing member forengagement with the edge of ribbon wound on said hub, and a carrier forsaid rollers movable axially of said hub.

10. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, driving means therefor, .abacking member rotatable with said hub, a roller yieldably urged towardsaid winding hub radially thereof and between which and said hub saidribbon is wound on to said hub, said roller having a cylindrical portionof less width than said ribbon engaging one face thereof and an annularshoulder at the end of said cylindrical portion engaging the edge ofsaid ribbon, and conical rollers having their axes lying in the surfaceof a cone coaxial with said hub and their surfaces in spaced relation tosaid backing member for engagement with the edge of ribbon wound on saidhub.

i5 11. A machine for winding transversely ribbed metal ribbon into adisk form filtering unit comprising a winding hub, driving meanstherefor, a backing member rotatable with said hub, a roller yieldablyurged toward said winding hub radially thereof and between which andsaid hub. said ribbon is wound on to said hub, said roller having acylindrical portion of less width than said ribbon engaging one facethereof and an annular shoulder at the end of said cylindrical portionengaging the edge of said ribbon, conical rollers having their axeslying in the surface of a cone coaxial with said hub and their surfacesin spaced relation to said backing member for engagement with the edgeof ribbon wound on saidhub, and a carrier for said rollers movableaxially of said hub.

12. A machine for winding transversely ribbed metal ribbon into adiskform filtering unit comprising a winding hub, driving meanstherefor, a backing member rotatable with said hub, an arm pivotallysupported on an axis parallel to said hub axis, and a roller supportedby said arm and being gravitationally urged toward said hub, said rollerhaving a cylindrical portion of less width than the ribbon engaging oneface thereof and an annular shoulder at the end of said cylindricalportion engaging the edge of said ribbon.

13. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, driving means therefor, abacking member rotatable with said hub, an arm pivotally supported on anaxis parallel to said hub axis, a roller supported by said arm and beinggravitationally urged toward said hub, said roller having a cylindricalportion of less width than the ribbon engaging one face thereof, anannular shoulder at the end of said cylindrical portion engaging theedge of said ribbon and conical rollers having their axes lying in thesurface of a cone coaxial with said hub and their surfaces in spacedrelation to said backing member for engagement with the edge of ribbonwound on said hub.

14. A machine according to claim 13characterized by a carrier for saidrollers movable axially of said hub.

15. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, a backing member rotatablewith said hub, a roller between which and said hub said ribbon is woundon to said hub, means supporting said roller for movement toward andaway from said hub and having provision for urging said roller towardsaid hub, said roller having a cylindrical portion of less width thansaid ribbon engaging one face thereof and an annular shoulder at the endof said cylindrical portion engaging the edge of said ribbon, means for"supplying ribbon to said hub at constant speed. and driving means forsaid hub. v a

16. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, a backing member rotatablewith said hub, an arm pivotally supported on an axis parallel to the hubaxis, a roller supported by said arm for movement tom ward and away fromsaid backing member and being gravitationally urged toward said hub,means for .supplying ribbon to said hub at constant speed, conicalrollers having their axes lying in the surface-of a cone coaxial withsaid hub and their surfaces in spaced relation to said backing memberfor engagement with the edge of ribbon wound on said hub, and drivingmeans for said hub.

17. A machine according to claim 16 chargo acterized by a carrier forsaid rollers movable axially'of said hub.

18. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit comprising a winding hub, driving means therefor,

25 a backing member rotatable with said hub, and

a roller yieldably urged toward said winding hub radially thereof andbetween which and said hub said ribbon is wound on to said hub, saidroller having a cylindrical portion of less width. than 80 said ribbonengaging one face thereof and an annular shoulder at the end of saidcylindrical portion engaging the edge of said ribbon. 19. A machineaccording to claim 18 characterized by conical rollers having their axes85 lying in the surface of a cone coaxial with said hub and theirsurfaces in spaced relation to said backing member for engagement withthe edge of ribbon wound on said hub. 1

20. A machine for winding transversely ribbed metal ribbon into a diskform filtering unit com- 6 prising a winding hub, driving meanstherefor,

a roller yieldably urged toward said winding hub I radially thereof andbetween which and said hub said ribbon is wound on said hub, said rollerhaving a cylindrical portion of less width than'lo said ribbon engagingone iface thereof and a circumferential flange at one end of saidcylindrical portion for engagement with one edge of said ribbon andspaced guide members for engagementwith opposite edges of the ribbon ad-15 vancing to said hub.

'21. A machine for winding transversely ribbed metal ribbon into adisk-form filtering unit comprising a winding hub,,driving meanstherefor,

a backing member rotatable with said hub, and 20 a roller yieldablyurged toward said winding hub radially thereof and between which andsaid hub said ribbon is wound on said hub, said roller having acylindrical portion of less width than said ribbon engaging one facethereof and a circumferential flange at one end of said cylindricalportion for engagement with one edge of said ribbon.

22. A machine according to claim 21 characterized by conical rollerswith their axes lying in the surface of a cone coaxial with said hub andtheir surfaces in spaced relation to said backing member for engagementwith the edge of ribbon wound on said hub.

' GEORGE A. ARNOLD.

